in the period 2011, lott inc. performed services for $120,000 and billed its customers. the company subsequently collected $82,000 of the amount billed. lott incurred $75,000 of operating expenses but paid cash for only $62,000 of that amount. lott acquired $30,000 cash from the issue of common stock. the company invested $18,000 cash in the purchase of land. what is the amount of net income for the period?